Abstract
I cannot imagine what it must be like to live in Flint, Michigan. To be a parent there. To lose faith in the simple ritual of safely drinking water from the kitchen faucet. Twenty‐five years ago the US Environmental Protection Agency (USEPA) published the Lead and Copper Rule (LCR) to control lead and copper in drinking water. The reason for the rule is that lead and copper negatively affect our health – that much is clear. What is not widely understood outside of the water treatment and regulatory communities is that the LCR's action level is not a health‐based limit but rather a trigger for water providers to pursue better corrosion control. There are other parts of the LCR that are confusing as well, but the simple fact is that as long as there are lead pipes in the ground or lead plumbing in the home, some risk remains.
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